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pipe fitting : 33 phrases in 18 subjects |
| Armored vehicles | 1 |
| Energy industry | 3 |
| Firefighting and fire-control systems | 1 |
| General | 3 |
| GOST | 1 |
| Makarov | 1 |
| Mechanics | 2 |
| Metallurgy | 1 |
| Military | 4 |
| Mining | 1 |
| Oil / petroleum | 2 |
| Pipelines | 3 |
| Plumbing | 2 |
| Rail transport | 1 |
| Technology | 3 |
| Thermal engineering | 1 |
| Transport | 2 |
| Valves | 1 |